/Engine/Plugins/Experimental/Animation/MotionTrajectory/Source/MotionTrajectory/Public/CharacterTrajectoryComponent.h
This can be called when bAutoUpdateTrajectory is false to manually control when trajectory updates.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Trajectory") void UpdateTrajectory ( float DeltaSeconds )